<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			var f1 = false;
			var f2 = true;
			
			document.write(f1 + 1 + "<br>");
			document.write(f2 + 1 + "<br>");
			document.write(typeof(f1 + 1) + "<br>");
			document.write(typeof(f2 + 1) + "<br>");
			
		</script>
	</body>
</html>
